[sap-log-sd] Partially Save PGI for Outbound Delivery

Based on the STO, we are creating outbound delivery, most of the outbound delivery has nearly more than 200 line items, out of 200, nearly 120 line items TO created and confirmed, now the user wants to save PGI for only confirmed 120 line item, but system wouldn't allow us to confirm partial PGI, for these user have to delete the remaining 80 items then only system allow to do the PGI.

Is there any possibilities to save the outbound delivery partially, then for the next time when we open the same outbound delivery remaining unconfirmed line item have to show, and it allow us to save the remaining items.